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retro
Associate III
July 10, 2020
Question

any stm32 MCU with 5Vadc?

  • July 10, 2020
  • 3 replies
  • 1135 views

Hello,

I am working on a project and it would be very helpful if I could find a MCU with integrated 5V ADC. I know you can add a voltage divider for the 3.3V ADC but it won't work in my case for this project. Can anyone recommend me something? Thank you:D

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3 replies

TDK
Super User
July 10, 2020

No STM32 chips can take 5V for VDD, if I'm not mistaken.

A voltage divider for a power supply isn't the right approach. You'd want a linear regulator, or an LDO (low dropout regulator).

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retro
retroAuthor
Associate III
July 10, 2020

of course, i meant voltage divider for the adc inputs.

LMI2
Senior III
July 10, 2020

"but it won't work in my case for this project. Can anyone recommend me something? Thank you:D" I can recommend a change of starting point. If resistive divider does not suit, there are good op amps which surely can do the job.

Edit: does suit->doesn't suit

S.Ma
Principal
July 11, 2020

5V ST MCU? I guess then it is in the STM8A portfolio.

Typically true 5V requires a thicker gate oxide than 3.3V hence either an older terchno or a newer techno with an additional oxide.